How about this? Cheers, JG

http://www.altereagle.com/Crown_molding.html

wrote:

Hi,

I have been attempting to recreate a cornerblock for crown molding that
I picked up at a hardware store. I was somewhat successful when I built
them a while back but the angles were not quite accurate but it was
close enough. I regretfully didn't write down the angles and I am
having a hard time duplicating it. I would just purchase them but every
time I see them they look like crap. Poorly made. The typical angles
for outside corners do not seem to be working for me. If anyone knows
of the correct bevel and miter angles to build this corner block I
would be most appreciative. I already have the top square part
constructed. I am including a link to a picture I took of the only
decent one I found a while back to model off of. Thanks everyone!

http://www.patmedia.net/marklevinson/cornerblock.htm